em7455

Fixing the "SIM Card Not Found" Issue on the ThinkPad X1 Carbon EM7455 4G Modem

# 2018-09-21
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Category: Notes
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CN · JP

I got a 4G modem for my ThinkPad X1 Carbon: the EM7455.

Adding a Sierra em7455 4G Module to the ThinkPad X1 Carbon 5th

# 2017-09-28
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Category: Gadgets
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CN · JP

When I bought my ThinkPad X1 Carbon 5th from a Japanese seller, I didn’t get the LTE version. That didn’t stop me from adding it myself later. The method follows this post by Dàn, which is what I copied. First you need an antenna: